Unit Convert vs ConvertPro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Unit Convert
This utility app offers seamless unit conversions without ads or accounts. It supports offline use, custom units, and precise fractional inch conversions, making it a powerful tool for everyday and professional needs.
- Ad-free and account-free operation
- 100% offline functionality
- Custom unit creation
- Fractional inch conversion with selectable precision
- Feet-inches to metric conversion
- Integrated calculator for fractions
- Live exchange rates (cached offline)
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No categories to browse. No ads to dismiss. Just start typing—it’s as simple as this. Built to stay. Out of your way. -No Interruptions. Zero ads, zero banners—focus entirely on the task at hand. -No Accounts. Open the app and start converting. We don't track you, and we don't require a login. -Unplugged. Every conversion engine is built to work 100% offline. From remote job sites to the heart of the kitchen, your tools are always ready. -Make the app your own by adding custom units. Choose your preferred output—decimal, scientific, or fractional—and save your most frequent conversions as Favorites for one-tap access. Precision you need, at lightning speed. -Convert to fractional inches with selectable precision—down to 1/16", 1/32", or beyond. Include conversion to fractional inches with ability to select accuracy (1/8, 1/16 etc). For example 35.235 cm -> 13 7/8" or 13 28/32" depending on the level of precision chosen. -Includes conversion from "feet inches" and to "feet-inches". For example convert 6' 4" -> 193.040 cm. Convert 282.43 cm -> 9' 3 1/4". -Includes conversion from "pound ounces". For example convert 2 lb 18 oz -> 2.325 kg. -Effortlessly bridge the gap between "Feet-Inches" and metric. Move from 6' 4" to centimeters and back again with surgical accuracy. -Perform basic math and input fractions directly into the conversion field. It’s a calculator and a converter, perfectly in sync. Infinite range, for every exchange. -Always Current. Access live exchange rates that stay cached for offline use when you’re off the grid. -Depth and Breadth. Whether it’s running pace, shoe sizes, or mass-to-volume for the perfect bake, we’ve covered the essentials and the obscure. -Industrial Strength. Professional-grade support for flow rate, torque, force, viscosity, and density.
ConvertPro
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Get the measurement. Get the answer. Get back to work. ConvertPro is a measurement toolkit for people who work with their hands — trades, technicians, makers and engineers. It opens on the converter, takes fractions the way you actually write them, and works with no signal at all. FRACTIONS DONE PROPERLY Type 7 3/8 and get 187.325 mm — not 187.3. Tap a fraction key instead of hunting for a decimal. Convert back the other way and see the nearest 1/2 through 1/64, with exact matches marked so a rounded fraction never pretends to be exact. COMPOUND MEASUREMENTS 5' 8", 2 lb 8 oz and 2h 35m are single measurements, and ConvertPro reads and writes them that way. 68 inches comes back as 5 ft 8 in. A KEYPAD BUILT FOR MEASURING Big keys, a fraction slash, a space for mixed numbers, and one-tap fraction shortcuts. No fighting a phone keyboard for a slash. BUILT FOR YOUR TRADE Choose Construction, Electrical, Plumbing, HVAC, Woodworking, Mechanical, Engineering or Cooking — or several. The categories and tools you need come first. PROFESSIONAL CALCULATORS Concrete volume, flooring with waste, paint coverage, slope and grade, board feet, lumber sizes, Ohm's law, AWG wire gauge, voltage drop, pipe volume, duct airflow and recipe scaling. Calculators are clearly marked as calculators. Each one states its assumptions, because an estimate is not a code compliance check. ACCURATE ON PURPOSE Imperial and metric conversions use the exact factors from the 1959 international yard and pound agreement — one inch is exactly 25.4 mm. Pressure, force, torque, power and energy follow SI definitions. Temperature converts affinely, so °C, °F, K and °R all round-trip exactly. AWG figures are computed from the defining formula rather than copied from a table. All of it is covered by an automated test suite. WORKS OFFLINE. ALWAYS. Every conversion, calculator, widget and Shortcut runs on your device. The unit database is inside the app. Airplane Mode changes nothing. PRIVATE BY DESIGN No account. No sign-in. No analytics, no advertising, no third-party SDKs, no tracking of any kind. Your measurements, history, favorites and projects never leave your device. Conversion history can be switched off entirely. ALSO INCLUDED • Widgets for the Home Screen and Lock Screen • Siri Shortcuts and App Intents that convert without opening the app • Favorites, searchable history and projects • Search that answers "10 ft to m" as you type • Full VoiceOver, Dynamic Type, Reduce Motion and Voice Control support • Light and dark themes, both deliberately designed • Eight languages: English, French, Spanish, German, Italian, Portuguese (Brazil), Dutch and Polish FREE FOREVER Length, area, volume, mass, temperature, speed and time conversions. Favorites, history, offline use, and the fraction tool. No ads, and no limit on how much you convert. CONVERTPRO PRO — ONE PAYMENT Every trade mode, all seventeen professional tools, the advanced categories (pressure, torque, flow, density, viscosity, thermal and the full electrical set), projects, advanced precision and fraction denominators, and the widgets. Bought once, not rented. Family Sharing included. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is update cadence: ConvertPro at monthly against Unit Convert's every 3 months. Unit Convert's advantage is device support (4 vs 2) and iOS requirement (15.6 vs 18.0). On price, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Unit Convert sells 1 one-off in-app purchase and ConvertPro sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
Unit Convert ships an update every 3 months, ConvertPro monthly. The most recent releases landed on October 27, 2026 and October 31, 2026 respectively.
| Parameter | Unit Convert | ConvertPro |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (15 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 15 — better | — |
| Update frequency | Every 3 months | Monthly — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad |
| Requires iOS | 15.6 — better | 18.0 |
| Further details — not scored | ||
| Size | 3 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | River Right Ltd | Ademola Mayowa Olatunji |
In-app purchases
Unit Convert
- Exchange Rates$0.99
ConvertPro
- ConvertPro Pro$4.99
Questions
Is Unit Convert free?
Is ConvertPro free?
Do Unit Convert or ConvertPro have ads?
Which is updated more often, Unit Convert or ConvertPro?
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